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Refactoring is a disciplined technique for restructuring an existing body of code, altering its internal structure without changing its external behavior. Its heart is a series of small behavior preserving transformations. Each transformation (called a “refactoring”) does little, but a sequence of these transformations can produce a significant restructuring. Since each refactoring is small, it's

This is the online catalog of refactorings, to support my book Refactoring 2nd Edition. This catalog of refactorings includes those refactorings described in my original book on Refactoring, together with the Ruby Edition. I've put together this catalog to help you find and explore the refactorings the 2nd edition. Each card shows the name used in the second edition together with any aliases for t